Vat dyestuff and process of making same.



To FARBWERKM VORM. MEEST-E3,

,025,1 No Drawing.

Be it 531mm iim. I, RUDGLF MAAS., 2h, l. D., chen-1153, a cxiizreu of the Republic of' l. AS new prouct, the described 4. The process ofAmanufacturing :i yellow vat dyestuff, which consists in causing para-chloranlin to' act npon 26dichloro bcnzoquinonc. Lv s In testimony whereof, aliX-my signature in presence of two witnesses.

RAUDoLF MMG.

glacial acetic acid and nitrobenzene with a brownislired colo, in concentrated sulful'ic acid with a. violetcolor yielding, when' gently heated with alkaline hydrosulfite, a 5 light yellowish vat which dyeswool, when subsequently "oxidized, fast yellow tints.

3. The process of manufacturing yellow vat dyestus which consists in causing parahalogen' substituted anilins to act upon 10 halogen derivatives of benzoqunone oontainng more than one halogen atom.

f Witnesses: JEAN GRUNDVf CARL GRUND. 

